Getting fatal error at the time of - git pull - SSL routines:SSL3_GET_RECORD

The Op mentions

my problem is fixed. Internet speed was very slow so issue occurs.

But do also consider that GitHub disabled just yesterday (Feb. 22 2018) deprecated algorithms:

• TLSv1/TLSv1.1: This applies to all HTTPS connections, including web, API, and git connections to https://github.com and https://api.github.com.
• diffie-hellman-group1-sha1: This applies to all SSH connections to github.com
• diffie-hellman-group14-sha1: This applies to all SSH connections to github.com

Upgrading to the latest Git should be enough to not be no